# K2C400000910

**KYX** · Crystals · SMD2520-4P

K2C400000910 from KYX, in a SMD2520-4P. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | XTAL1 | passive | Crystal terminal for the 40.000 MHz fundamental-mode resonator (9 pF load capacitance, 100 μW max drive level). |
| 2 | GND | power_in | Connected to the metal cover (lid); the datasheet says to connect it to GND. |
| 3 | XTAL2 | passive | Crystal terminal for the 40.000 MHz fundamental-mode resonator (9 pF load capacitance, 100 μW max drive level). |
| 4 | GND | power_in | Connected to the metal cover (lid); the datasheet says to connect it to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KYX |
| Package | SMD2520-4P |
| Category | Crystals/Oscillators/Resonators |
| Pins | 4 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Frequency Tolerance |  | -10 |  | 10 | ppm | at 25℃±3℃ | 2 |
| Frequency Characteristics Over Temperature |  | -10 |  | 10 | ppm | -40℃～+85℃ | 2 |
| Equivalent Series Resistance |  |  |  | 40 | Ω |  | 2 |
| Shunt Capacitance |  |  |  | 3 | pF |  | 2 |
| Insulation Resistance |  | 500 |  |  | MΩ | at 100 V | 2 |
| Aging |  |  |  | 3 | ppm/Year |  | 2 |
| Operating Temperature Range |  | -40 |  | 85 | ℃ |  | 2 |
| Storage Temperature Range |  | -40 |  | 85 | ℃ |  | 2 |
| Frequency |  |  | 40 |  | MHz | Fundamental mode | 2 |
| Load Capacitance | CL |  | 9 |  | pF |  | 2 |
| Drive Level |  |  | 100 |  | μW |  | 2 |

## CAD (KiCad official)

- Symbol: `K2C400000910`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `k2c400000910-etched.step` / `k2c400000910-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `k2c400000910.step` / `k2c400000910.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [KYX datasheet](docs/k2c400000910-datasheet.pdf) (5 pp, sha256 `b6709d19cdc725f5`, retrieved 2026-10-22, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/k2c400000910-datasheet.pdf)